 In this presentation, we will take a look at a materials ledger card and materials requisition form. This is going to be an example of a materials ledger card. And you can note that it's going to look very similar to us tracking inventory. We're basically tracking the inventory of materials. So if you work with a merchandising company, a company that purchases and sells inventory, we'll have a similar kind of tracking system that we might use for the tracking of inventory. In this case, of course, we're using it for one component of inventory, one component of of in this case, the type of services or the type of inventory that we make. So if we make guitars, for example, the major component might be wood. And so we would have to track that major component in a similar way that we would have to track the entire units of inventory for a merchandising company. So we might have things like on the inventory items in this case, we're going to say it's the wood planks.